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Re: [css-ruby] Add "text-orientation: upright" for bopomofo annotation

From: Xidorn Quan <quanxunzhen@gmail.com>
Date: Wed, 26 Aug 2015 08:05:19 +1000
Message-ID: <CAMdq69-mmUN_ECudJ+ZYF8JJpMEn1sHEExtbDmV8WsNNUW+8yw@mail.gmail.com>
To: fantasai <fantasai.lists@inkedblade.net>
Cc: www-style list <www-style@w3.org>, Koji Ishii <kojiishi@gmail.com>
On Wed, Aug 26, 2015 at 12:15 AM, fantasai
<fantasai.lists@inkedblade.net> wrote:
> On 08/25/2015 02:59 PM, Xidorn Quan wrote:
>> I propose that we should add "text-orientation: upright" to the
>> "rt:lang(zh-TW)" rule.
>> The reason is that, all the tone marks in bopomofo (U+02CA, U+02C7,
>> U+02CB, U+02D9) have Vertical_Orientation property "R" while the
>> bopomofo characters are all "U". It means, without explicitly setting
>> text-orientation to upright, the text run would break between them,
>> which makes it impossible to use font feature to place the tone mark
>> properly.
> I think it would make more sense to have Unicode update UTR50 to make
> these characters upright in mixed-orientation text (or otherwise tailor
> it within CSS as a whole). It's not just a problem with ruby.

Well, that could be tricky, because those characters might also be
used with latin scripts. I'm not sure anyway.

Koji, any thoughts?

- Xidorn
Received on Tuesday, 25 August 2015 22:06:28 UTC

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